I have been testing all of my scopes. All of them are kept at 74 to 78 degrees.
At night I put them out to cool down. At first images are sharp before cool down. Gradually over 4 to 6 hours it goes very bad.
Here are the tested scopes.
9” apo
11.8” mewlon
C14
Questar 7”
Passive cool down used
At night I put them out to cool down. At first images are sharp before cool down. Gradually over 4 to 6 hours it goes very bad.
Here are the tested scopes.
9” apo
11.8” mewlon
C14
Questar 7”
Passive cool down used
